Dredging and excavating machine.



. f am s.: 7 1 i., .w w m w 1 n m V 31 A m D ow m W R n 5 P M A 2 n m I fl T M G rl N I E H ma T uc A G L P Aa Mo e w G- Nm M II. YTT M www @@@QQQQ W D w www @@@QQQQQQ EXH m XBW JMU n A m Am m Gn Nn I G D M D 9 0, 1 5 8 m N 2 BHEBTB-BHBET 2.

PATENTED APR. 23, 1907.

f//Q//f/ J. KENNEDY. DREDGING AND BXCAVATING MACHINE.

APPLICATION FILED 00T. 1B, 1906.

JOHN KENNEDY, oE MONTREAL, QUEBEC, CANADA.

DREDGING AND EXCAVATING MACHINE.

No. 851,093. f

I Application iled October '18, 1906. Serial No. 339,527.

.To-a/ZZ whom it'ma/y concern,.-

Be it known that I, JOHN KENNEDY, of the city of Montreal,l Province of Quebec, Canada, have inventedy certain new and useful Improvements in Dredging and Excavating Machines; and I do'hereby declare that the following is a full, clear, `and exact description ofl theI same.

My invention relates particularly to the teeth of the buckets of dredging and excavating machines, and it has for its object. to inf crease the utilit of these devices and render them more easi y and cheaply renewable.

The invention may be said briefly to consist of a tooth comprising a carrying member l 1 and a changeable point, one of such parts having a pair of tapered. plate-like flanges A overlapping the other part and fitting into recesses therein the point and carrying member byeach presenting a portion Within the thjdf ,theVl overlapping devices and equal epth "at that point to the greatest crossjpsection of'thzfiange's and the portion of the said carryingmember they overlap. The point is secured in `place and the slack between it andthe carrying member taken up by a tapered key driven transversely through l I registering .o rtions of the said point and carinem er For full comprehension, howeveiyof my invention reference must be had to the accompanying drawings, forming a part of this speci- 'i iication, in which similar reference characters "indicatethefsame parts and wherein:

Figure lis a 'side elevation of a portion of a dredging orexcavating bucket with my in- Avention applied thereto; .Figs. 2 and 3 are a side elevation and a plan view, respectively,

^ of'my improved tooth; Fig. 4 is a detail view of the shank alone; Fig. 5 is a like view of the changeable point; Figs..6, 7, 8, and 9 are transverse sectional views taken on the ref Speetive lines A A, B E, D D, and E E, Fig. 2

.' and Fig. 10 is a longitudinal sectional view taken on line C C Fig. 2.

The changeable point consists of a Wedge 'shaped member cored out to present apair of wedge .shaped recesses c between flanges c and divided by'a web d, anol each flange e is reduced abruptlyin width, as at c, about midway of its length, and tapered from such point to its rear end where its corners are Specification of Letters Patent.

Patented April 23, 1907.

g separated by a spacehy receive the tapered portions of the flanges@ of the point, While the said members g fit into the wedge shaped recesses c. A tapered hole 7c is made through'the members g and ahole m in the web coincides therewith whenthe point is in place, while a taperedkey or cotter n prevents longitudinal displacement of the point and while being driven home draws the A' point tightly upon its' carrying member .a l

perfect splice being eHected By means of my improvedconsftruction of: r point and its 'carryingmemthe changeable ber, both tooth and carrying lmember.-haare their full depth throughout the' whole]orff'inj.- greater part of the length of the splice;` the* tapered recesses in the top and bottom ofthe carrying member and the tapered top. and

bottom fianges of the point, fitting into these recesses, cause such point and carrying inember to be rigidly wedged together thereby preventing lateral or horizontal movement and the Wedge shaped members fitting into the wedge-shaped recesses between the flanges of the point cause the latter and its carrying member to be wedged to ether against displacement up and down, an consequently, at right angles to the first mentioned wedgin action; while the tapered key or cotter enab es the slack between the point and its carrying member to be taken up.

My improved changeable point can, when its edge is worn and the iiatness of its underside disturbed, be reversed and the top turned to the bottom, and to enable this to be done the tapered hole is placed in the middle and the apex is kept comparatively thick to within a short distance of the edge (as at u) and the top side is inclined sharply to the apex (as at o), while the bottom flat side is extended to the apex. Heretofore when the tooth was worn to the dotted line w it had to be. removed, heated, and drawn before it could be again set in place and used. When my improved changeable point is worn Jrhe IOO tapered key or cotter is driven out, andthe point knocked 0H and reversed and again wedged upon its carrying member, the point L bucket t. This particular carrying member is shown as an instance only as the invention' can'be equally well applied to the shanks secured upon the inside of the bucket bottom, or the member can, in the case of elevator dredges and other types of dredges andexcavatorsbe cast solid with the lip of the bucket, in fact the invention is applicable wherever dredging or excavating teeth are used.

If desired the recesses in the converging sides of the point and carrying member can be varied in form without departing from the spirit of -iny invention.

Ihat I claim is as follows l. A tooth for dredging and excavating machines and the like comprising a carrying member and a changeable point, one of such parts having a pair of plate-like flanges of less width than and overlapping the other part, the said other part having recesses into which the said flanges fit.

2. In a tooth for dredging and excavating machines, the combination with a carrier presenting a pair oflseparated wedge shaped members7 of a changeable point presenting a -pair of wedge shaped recesses divided by a web, means securing the point upon the carrier withthe members wedged in the recesses and the web between the `said members and means distinct from the web for preventing displacement of the point in a direction transversely to the tooth.

3. A tooth for dredging and excavating machines, and the like, comprising a part consisting of a carrying member and a second part consisting of a changeable point,

one of the said parts having tapered plate' like ianges fitting into corresponding recesses in the other part.

4. A tooth for dredging4 and excavating machines, and the like, comprising a part consisting of a carrying member and a second part consisting of a changeable point, one of the said parts having plate-like iianges fitting into recesses in the other part; the platelike devices being tied together by a web and in the form of a shank slof the type boltedvfto.. 'the' exterior of the bottom or' a dredging i i l the said other part having a slot Afor accommember, of a reversible changeable convergmodating the web.

5. A tooth for dredging and excavating machines, and the like, comprising a part consisting of a carrying member and a s econd part consisting of a changeable point,

with the carryin one of the said parts having plate-like 'Hanges iittinginto recesses in the other part; and means whereby the slack between the said parts is taken up.

6. -In a tooth for dredging and excavating machines, the combination with a wedge shaped carrying member with recesses in their converging faces, suoli recesses being tapered in their longitudinal direction, of a changeable point presenting a wedge shaped recess adapted to receive the carrying member, and tapered langes adapted to iit into the tapered recesses of such member, and means securing the point in wedging relation g member.

7. In a tooth Jibi' dredging and excavating machines, the combination with a wedge shaped carrying member, of a changeable point presenting a wedge shaped recess adapted to receive the carrying member, a tapered key or cotter securing the point in 'wedging relation with the carrying ymember and adapted to take up the slack between the'said parts, and means preventing lateral v displacement of the said point.

8. A tooth for dredging and'. excavating machines, and the like, comprising a transversely perforated tapered carrying member and a changeable point recessed to fit upon the said tapered carrying member and presenting a part with a perforation adapted when the parts are in operative position to register with the perforation in the carrying member, and a tapered pin engaging in the registering perforations Jfor securing the point in place and whereby thev slack between the said parts is taken up. f

9. In a tooth for dredging and excavating machines, the combination with a carrier presenting a pair of separated wedge shaped members with recesses in their converging faces such recesses being tapered in their longitudinal direction, of a changeable point presenting a pair of wedge shaped recesses divided by a web and having tapered ilanges adapted to fit into the tapered recesses of such member, and a tapered -key or cotter securing the point upon the carrier with the members wedged in the wedge shaped recesses the tapered flanges in the tapered recesses and the web between the said members, such key or cotter being adapted to take up the slack between the said parts.

10. In a tooth for dredging and excavating machines, the combination with a carrying member, of a reversible changeable point.

l1. In a tooth for dredging and excavating machines, the combination with a carrying ing point with one side flat and its other side inclined to its apex in two angular planes.

12. A tooth for the purpose set forth, comprising a carrier presenting wedge shaped IOO l'IO

name to this specication, in the presence of two subscribing Witnesses:

JOHN KENNEDY.

Witnesses:

GEO. SMART, M. P. FENNELL, Jr. 

